The craggy appearance of this coral reef-dwelling crab helped it earn the scientific name Daldorfia horrida or Horrible Elbow Crab.

"As if fearsome looks weren't enough, there have been sporadic reports of people being poisoned after consuming it," write crab experts J.C. Mendoza and Swee Hee Tan, who helped collect and identify these specimens for the Santo 2006 biodiversity expedition in Vanuatu.

Photograph by Raffles Museum of Biodiversity Research, National University of Singapore